Download Hector SLAM ROS package,
$ cd ~/catkin_ws/src
$ git clone https://github.com/tu-darmstadt-ros-pkg/hector_slam.git
Download depthcam_hector_slam package and replace Hector Mapping node with the included one,
$ git clone https://github.com/jimcha21/depthcam_hector_slam.git
$ cp slammin/hector_mapping/src/{HectorMappingRos.cpp,HectorMappingRos.h} hector_slam/hector_mapping/src/
and build,
$ catkin_make install
Todo-> Add launch files, Add Gazebo simulated world